In the face of armed invasion, the Mexican government assumed a more reasonable attitude, and on the 19th day of February, 1862, the plenipotentiaries of Spain, Great Britain, and France signed, at Soledad, with the secretary of state of the Mexican government a preliminary agreement or convention, in which they recognized the constitutional government as then organized. Declaring that they had "no designs against the independence, sovereignty and integrity of the Mexican republic," they agreed to open negotiations for the settlement of all the demands which they had to make at Orizaba. During the negotiations the forces of the allies were to be allowed to leave the unhealthy locality of Vera Cruz and occupy the three towns of Cordova, Orizaba, and Tehuacan, with their natural approaches. In the event of negotiations being broken off, the allies agreed to abandon the towns above named before reopening hostilities.[211]
The convention of Soledad proved, however, of short duration. On the 9th of April, 1862, the representatives of the allies announced in a formal note to the Mexican government, "that not having been able to agree about the interpretation which ought to be given in the present circumstances to the convention of the 31st of October, 1861 (the convention of London), they have resolved to adopt for the future an entirely separate and independent line of action. In consequence, the commander of the Spanish forces will immediately take the necessary measures to reimbark his troops. The French army will concentrate in Paso Aucho as soon as the Spanish troops have passed from this position, that is to say, probably about the 20th of April, thereupon beginning their operations."[212] According to instructions already alluded to, the British force, which was limited to 700 marines, had declined to advance into the interior, and hence was not present when the breach occurred.
In spite of all appearances to the contrary, the French government still persisted in disavowing to the United States government, in the most emphatic terms, all designs upon the independence of the Mexican republic. Even after the rupture at Orizaba, M. Thouvenel assured Mr. Dayton, the United States minister at Paris, that all that France wanted was that there should be a stable government in Mexico, not an anarchy with which other nations could have no relations.
That if the people of that country chose to establish a republic it was all well; France would make no objection. If they chose to establish a monarchy, as that was the form of government here, it would be charming (charmant), but they did not mean to do anything to induce such a course of action. That all the rumors that France intended to establish the Archduke Maximilian on the throne of Mexico were utterly without foundation.[213]
M. Thouvenel's disclaimer to the British government was equally emphatic.[214]
To return to the situation of affairs at Orizaba, the disagreement between the allies requires some explanation. The immediate cause of the rupture and of the withdrawal from the convention of London was the protection extended by the French agents to General Almonte, Padre Miranda, and other leading men of the reactionary or church party who had been banished from the country and who now from the French camp maintained an active correspondence with Marquez, Cobos, and other notorious chiefs of the armed bands then in open rebellion against the constituted government of the country. Almonte and his associates openly favored the scheme of placing Maximilian on the throne.
The Mexican government demanded the removal of General Almonte and his associates from the camp of the allies, and in this demand the British and Spanish representatives concurred. A somewhat stormy conference was held between the commissioners of the allied powers at Orizaba, April 2, 1862, at which the French agents virtually said that they did not regard the convention of London or the preliminaries of Soledad as binding upon them. Specifically then the two causes of the rupture were (1) the persistency of the French commissioners in opposing the removal of the Mexican exiles, and (2) their refusal to take part in the conferences which had been arranged by the convention of Soledad to be held with the Juarez government at Orizaba, April 15, 1862. The British government heartily approved of the action of its agent, Sir Charles Wyke, in breaking up the conference and putting an end to the joint action of the three powers.[215] The policy of Spain was completely in accord with that of England.
The French government was not satisfied with the convention of Soledad, but did not dispute its validity, and declared that if the negotiations should be broken off, its provisions in regard to the withdrawal of the troops from their vantage ground must be observed. The French government further assumed that, when negotiations with the Mexican government should be broken off, the allied forces would proceed to act jointly under the convention of London.[216] The British and Spanish governments, however, having become convinced of the duplicity of the French government in the matter, terminated the London convention without further discussion and ordered the immediate withdrawal of their forces and agents from Mexican territory.
The government of Louis Napoleon, thus left to its own devices by the withdrawal of Great Britain and Spain, and by the helpless condition, for the time being, to which the war of secession had reduced the government of the United States, greatly reinforced its Mexican expedition and placed General Forey in command. Soon after the withdrawal of the British and Spanish contingents, General Almonte instituted a government in the territory occupied by the French and assumed the title of "Supreme Chief of the Nation," but it soon became evident, as Mr. Dayton expressed it, that instead of the emperor having availed himself of the services of General Almonte, Almonte had availed himself of the services of the emperor. Accordingly, shortly after General Forey assumed command, he issued an order dissolving the ministry of Almonte, depriving him of his title and limiting him thereafter "in the most exact manner to the instructions of the emperor, which are to proceed as far as possible, with other Mexican generals placed under the protection of our flag, to the organization of the Mexican army."
The misfortunes which had overtaken Mexico and the dangers that threatened the permanence of her republican institutions, had now thoroughly alarmed her sister republics of Central and South America, and a correspondence began between them relative to organizing an international American conference to oppose European aggression.